<%@ page import="java.util.List" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.ResultSet" %>
<%@ page import="java.sql.DriverManager" %>
<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2018-3-20
  Time: 15:46
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title></title>
</head>
<body>

<%--<jsp:include page="isLogin.jsp"/>--%>

<%@include file="isLogin.jsp" %>

<h1>用户管理系统</h1>

<a href="addUser.jsp">add user</a>
<style type="text/css">

    table {
        border: 1px solid #000;
        border-collapse: collapse;
    }

    td, th {
        border: 1px solid #000;
        padding: 10px;
    }

</style>


<table>
    <thead>
    <tr>
        <th>编号</th>
        <th>用户名</th>
        <th>密码</th>
        <th>操作1</th>
        <th>操作2</th>
    </tr>
    </thead>

    <tbody>


    <%
        class User {
            int id;
            String username;
            String password;

            // alt + insert
            public User(int id, String name, String password) {
                this.id = id;//this表示类或者对象的所有者
                this.username = name;
                this.password = password;
            }
        }

//        User chen = new User(1, "chengongsuo", "123456");
//        chen.id = 1;
//        chen.username = "chengongsuo";
//        chen.password = "123456";

        List<User> list = new ArrayList<User>();
//        list.add(new User(1, "chengongsuo", "123456"));
//        list.add(new User(2, "zhen", "123456"));
//        list.add(new User(3, "John", "123456"));
//        list.add(new User(4, "Bob", "123456"));


        // 3 + 1
        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        String sql = "select * from t_users";

        Class.forName("com.mysql.jdbc.Driver");

        connection = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/sctu_javaweb_2018",
                "root",
                "sctu123456"
        );

        statement = connection.createStatement();

        resultSet = statement.executeQuery(sql);

        while (resultSet.next()) {

            int id = resultSet.getInt(1);
            String username = resultSet.getString(2);
            String password = resultSet.getString(3);

            User user = new User(id, username, password);
            list.add(user);

        }
        resultSet.close();
        statement.close();
        connection.close();


// 221
        for (User user : list) {

            out.write("<tr>" +
                    "<td>" + user.id + "</td><td>" + user.username + "</td>" +
                    "<td>" + user.password + "</td>" +
                    "<td><a href='deleteUserHandler.jsp?id=" + user.id + "'>删除</a></td>" +
                    "<td><a href='updateUser.jsp?id=" + user.id + "&username=" + user.username + "&password=" + user.password + "'>更新</a></td>" +
                    "</tr>");
        }
//
//        for (int i = 0; i < 10; i++) {
//            // alt + shift + 向上箭头
//            // ctrl + alt + L
//            out.write("<tr><td>" + i + "</td><td>Jhon</td><td>123</td></tr>");
//        }
    %>


    </tbody>

    <tfoot>
    </tfoot>
</table>

<!--
JSP指令:
page
include
taglib

JSP动作元素：
jsp:include
jsp:param

-->

<!-- 静态信息 -->
<%@ include file="footer.jsp" %>

<!-- jsp前缀  动态信息 -->
<jsp:include page="footer.jsp">
    <jsp:param name="year" value="2018"/>
</jsp:include>


</body>
</html>
